Metal-reamer



(No'Model.) P. J. PELDT 8u F. C. MAHLER.

METAL BEAMER.

No. 470,295. Patented Mar. 8, 1892,v

UNITED STATES PATENT OEEICE.

FERDINAND J. FELDT AND FRANK C. MAHLER, OF PEORIA, ILLINOIS.

M ETAL-REAM ER.

SPECIFICATION forming part Of Letters Patent N0. 470,295, dated March 8,1892.

Application filed December 2, 1891. Serial No. 413,780. (No model.)

To all whom it may concern,.-

Be it known that we, FERDINAND J. FELDT and FRANK C. MAHLER, citizens ofthe United States, residing at Peoria, in the county of Peoria and Stateof Illinois, have invented certain new and useful Improvements in Metal-Reamers; and we do hereby declare that the following is afull, clear,and exact description of the invention, which will enable others skilledin the art to which it appertains to make and use the same.

Our invention relates to certain new and useful improvements inmetal-reamers by means of which a reamer is provided, simple inconstruction and effective for the purpose designed, durable, and cheapin first cost.

More particularly our invention relates to that class of reamers adaptedfor reaining out cocks, but may be used generally for reamin g out metaltubes, &c.

The particular features of our invention consist, essentially, of theform of the reamingtool, the same being semicircular, and of adetachable blade used in connection therewith, and the means of securingthereto an adjustment thereon, as will be more fully shown hereinafter.

That our invention may be more fully understood, reference is had to theaccompanying drawings, in which- Figure l shows the metal-reamer with aportion thereof broken away to show the means of securing thecutting-blade to the body of the tool. Fig. 2 is a plan view of theupper face of the tool, showing the adjustment of the blade, (Src. Fig.3 is a cut sectional view or transverse section of the tool.

In the figures, B represents a conicallyshaped section or body taperingfrom its base to its extremity and provided at its base with the stem C,purposed to iit within the socket of the chuck and being recessed at itsupper face to receive the cutting-blade A.

a a a are set-screws, bearing through the slots fff in the blade Aandwithin threaded openings in the body B of the tool to secure the Saidblade in proper adjustment for operation.

c k are threaded openings purposed to receive the headless screw k',which said screw is in alignment with and is designed to bear againstthe back of the blade A to facilitate its adjustment and to resist thetendency of the blade to be pushed backward by contact with hard metals.

t' represents the cutting-edge of the blade,

Tools that have heretofore been constructed for the purpose hereinspecified have been either wholly inadequate for the purpose designed orlack the element of durability pos 7o sessed by our improved tool.Reamingtools have been made with bodies similar toB with the edge of themetal formed into a cutting-tool, and when the same became dulled by useit could only be sharpened by cuttingaway the entire body of the tooluntil a proper edge was presented, this requiring a great amount oflabor and time, and as they were required to be sharpened quitefrequently, owing to the extreme hardness of the metal that might bedesigned to be cut and by the presence of more or less sand or gritvwithin the cocks which they were required to ream out, acting to dullthe tool or the edge thereof, and the sharpening process will constantlyreduce the size of the tool and render the same useless. Tools were alsoconstructed in the form of a blade, but were not practical in operation,as it was somewhat flexible and had a tendency to bear away from themetal by contact therewith, thus cutting an uneven and irregular openingor leaving the surface thereof rough. All the disadvantages incident tothe use of the styles of tool just mentioned are overcome by the use ofour improved reaming-tool.

The operation of the device is apparent,

the tool being first fixed to a rapidly-rotating medium, the connectiontherewith being made through and by means of the stem C. The cock is runupon the tool and is readily reamed out, ,the hole therein being madelarger the farther the same is pushed upon the tool. Vhen the bladebecomes dull, the

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same may be detached from the body of the tool by removing theset-screws al ct ct and ground or sharpened and again easily re! placedand secured, or the blade may be ground without detaching same by merelysllpplng saine forward in slots fff, and to facilitate the adjustment ofthe blade A the headless screws L are provided, that bear against theback edge of the blade, and by screwing the same forward when thesetscrews are slightly loosened the edge of the blade is forced outward,and the blade is held 1n this position by contact with the ends of thesaid screws and by the set-screws d ad, &c.

T he detailed structure of the tool may be varled to suit theapplication in which it may be desired to be used, and also the materialused in its construction may be of anything suitable for the purpose.r,She blades may be attached to a body made reun ding, fiat, square, or1n any form.

Having thus fully described our invention, what we claim, and desire tosecure by Letters Patent,Y is- In a reaming-tool, the combination, withthe half-circular body B, tapering from base to extremity and providedwith the stem C and raised portions V and m and having the threadedopenings and the headless screws t", of the blade A, provided with theslots f f, against the back of which the headless screws 7o bear, andsecured to the metal body B by means of the set-screws a a a, hearing inthreaded openings inthe metal body, all substantially as described andsetforth.

In testimony whereof we aix our signatures in presence of two witnesses.

FERDINAND J. FELDT. FRANK C. MAHLER. XVitnesses:

EDWARD Snrrz, CHARLES R. UHLMANN.

